a tour of 可以翻作“...之旅”既可以指真正的旅游，也可以用作比喻，如a tour of human body就是“人体之旅” be on a tour of 一般来说就是用于表示“在...的旅途中”，比如 When I was on a tour of Yunan, I met …
A Tour Of The Famous Mansions And Neighborhoods Where Did The Chrisleys Live In Georgia For Many Years